knackers

1.收买和屠宰废马的人;收买老病家畜[家畜尸体]的人

2.收买废屋[废船]的人

3.〈方〉老病无用的家畜

1.somebody who buys and slaughters old, worn-out, or injured horses for their body parts such as their flesh and hide

2.somebody who buys and demolishes unwanted buildings and sells their materials for scrap

1.to exhaust somebody completely

2.to make someone very tired

3.to hurt, damage, or destroy something

1.a man's or boy's testicles